1 | # twind.tcl -- |
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2 | # |
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3 | # This demonstration script creates a text widget with a bunch of |
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4 | # embedded windows. |
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5 | # |
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6 | # RCS: @(#) $Id: twind.tcl,v 1.3 2001/06/14 10:56:58 dkf Exp $ |
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7 | |
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8 | if {![info exists widgetDemo]} { |
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9 | error "This script should be run from the \"widget\" demo." |
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10 | } |
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11 | |
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12 | set w .twind |
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13 | catch {destroy $w} |
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14 | toplevel $w |
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15 | wm title $w "Text Demonstration - Embedded Windows" |
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16 | wm iconname $w "Embedded Windows" |
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17 | positionWindow $w |
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18 | |
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19 | frame $w.buttons |
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20 | pack $w.buttons -side bottom -fill x -pady 2m |
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21 | button $w.buttons.dismiss -text Dismiss -command "destroy $w" |
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22 | button $w.buttons.code -text "See Code" -command "showCode $w" |
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23 | pack $w.buttons.dismiss $w.buttons.code -side left -expand 1 |
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24 | |
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25 | frame $w.f -highlightthickness 2 -borderwidth 2 -relief sunken |
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26 | set t $w.f.text |
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27 | text $t -yscrollcommand "$w.scroll set" -setgrid true -font $font -width 70 \ |
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28 | -height 35 -wrap word -highlightthickness 0 -borderwidth 0 |
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29 | pack $t -expand yes -fill both |
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30 | scrollbar $w.scroll -command "$t yview" |
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31 | pack $w.scroll -side right -fill y |
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32 | pack $w.f -expand yes -fill both |
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33 | $t tag configure center -justify center -spacing1 5m -spacing3 5m |
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34 | $t tag configure buttons -lmargin1 1c -lmargin2 1c -rmargin 1c \ |
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35 | -spacing1 3m -spacing2 0 -spacing3 0 |
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36 | |
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37 | button $t.on -text "Turn On" -command "textWindOn $w" \ |
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38 | -cursor top_left_arrow |
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39 | button $t.off -text "Turn Off" -command "textWindOff $w" \ |
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40 | -cursor top_left_arrow |
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41 | button $t.click -text "Click Here" -command "textWindPlot $t" \ |
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42 | -cursor top_left_arrow |
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43 | button $t.delete -text "Delete" -command "textWindDel $w" \ |
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44 | -cursor top_left_arrow |
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45 | |
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46 | $t insert end "A text widget can contain other widgets embedded " |
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47 | $t insert end "it. These are called \"embedded windows\", " |
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48 | $t insert end "and they can consist of arbitrary widgets. " |
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49 | $t insert end "For example, here are two embedded button " |
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50 | $t insert end "widgets. You can click on the first button to " |
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51 | $t window create end -window $t.on |
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52 | $t insert end " horizontal scrolling, which also turns off " |
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53 | $t insert end "word wrapping. Or, you can click on the second " |
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54 | $t insert end "button to\n" |
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55 | $t window create end -window $t.off |
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56 | $t insert end " horizontal scrolling and turn back on word wrapping.\n\n" |
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57 | |
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58 | $t insert end "Or, here is another example. If you " |
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59 | $t window create end -window $t.click |
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60 | $t insert end " a canvas displaying an x-y plot will appear right here." |
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61 | $t mark set plot insert |
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62 | $t mark gravity plot left |
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63 | $t insert end " You can drag the data points around with the mouse, " |
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64 | $t insert end "or you can click here to " |
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65 | $t window create end -window $t.delete |
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66 | $t insert end " the plot again.\n\n" |
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67 | |
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68 | $t insert end "You may also find it useful to put embedded windows in " |
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69 | $t insert end "a text without any actual text. In this case the " |
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70 | $t insert end "text widget acts like a geometry manager. For " |
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71 | $t insert end "example, here is a collection of buttons laid out " |
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72 | $t insert end "neatly into rows by the text widget. These buttons " |
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73 | $t insert end "can be used to change the background color of the " |
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74 | $t insert end "text widget (\"Default\" restores the color to " |
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75 | $t insert end "its default). If you click on the button labeled " |
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76 | $t insert end "\"Short\", it changes to a longer string so that " |
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77 | $t insert end "you can see how the text widget automatically " |
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78 | $t insert end "changes the layout. Click on the button again " |
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79 | $t insert end "to restore the short string.\n" |
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80 | |
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81 | button $t.default -text Default -command "embDefBg $t" \ |
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82 | -cursor top_left_arrow |
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83 | $t window create end -window $t.default -padx 3 |
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84 | global embToggle |
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85 | set embToggle Short |
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86 | checkbutton $t.toggle -textvariable embToggle -indicatoron 0 \ |
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87 | -variable embToggle -onvalue "A much longer string" \ |
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88 | -offvalue "Short" -cursor top_left_arrow -pady 5 -padx 2 |
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89 | $t window create end -window $t.toggle -padx 3 -pady 2 |
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90 | set i 1 |
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91 | foreach color {AntiqueWhite3 Bisque1 Bisque2 Bisque3 Bisque4 |
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92 | SlateBlue3 RoyalBlue1 SteelBlue2 DeepSkyBlue3 LightBlue1 |
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93 | DarkSlateGray1 Aquamarine2 DarkSeaGreen2 SeaGreen1 |
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94 | Yellow1 IndianRed1 IndianRed2 Tan1 Tan4} { |
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95 | button $t.color$i -text $color -cursor top_left_arrow -command \ |
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96 | "$t configure -bg $color" |
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97 | $t window create end -window $t.color$i -padx 3 -pady 2 |
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98 | incr i |
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99 | } |
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100 | $t tag add buttons $t.default end |
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101 | |
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102 | proc textWindOn w { |
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103 | catch {destroy $w.scroll2} |
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104 | set t $w.f.text |
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105 | scrollbar $w.scroll2 -orient horizontal -command "$t xview" |
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106 | pack $w.scroll2 -after $w.buttons -side bottom -fill x |
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107 | $t configure -xscrollcommand "$w.scroll2 set" -wrap none |
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108 | } |
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109 | |
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110 | proc textWindOff w { |
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111 | catch {destroy $w.scroll2} |
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112 | set t $w.f.text |
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113 | $t configure -xscrollcommand {} -wrap word |
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114 | } |
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115 | |
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116 | proc textWindPlot t { |
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117 | set c $t.c |
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118 | if {[winfo exists $c]} { |
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119 | return |
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120 | } |
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121 | canvas $c -relief sunken -width 450 -height 300 -cursor top_left_arrow |
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122 | |
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123 | set font {Helvetica 18} |
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124 | |
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125 | $c create line 100 250 400 250 -width 2 |
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126 | $c create line 100 250 100 50 -width 2 |
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127 | $c create text 225 20 -text "A Simple Plot" -font $font -fill brown |
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128 | |
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129 | for {set i 0} {$i <= 10} {incr i} { |
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130 | set x [expr {100 + ($i*30)}] |
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131 | $c create line $x 250 $x 245 -width 2 |
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132 | $c create text $x 254 -text [expr {10*$i}] -anchor n -font $font |
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133 | } |
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134 | for {set i 0} {$i <= 5} {incr i} { |
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135 | set y [expr {250 - ($i*40)}] |
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136 | $c create line 100 $y 105 $y -width 2 |
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137 | $c create text 96 $y -text [expr {$i*50}].0 -anchor e -font $font |
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138 | } |
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139 | |
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140 | foreach point { |
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141 | {12 56} {20 94} {33 98} {32 120} {61 180} {75 160} {98 223} |
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142 | } { |
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143 | set x [expr {100 + (3*[lindex $point 0])}] |
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144 | set y [expr {250 - (4*[lindex $point 1])/5}] |
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145 | set item [$c create oval [expr {$x-6}] [expr {$y-6}] \ |
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146 | [expr {$x+6}] [expr {$y+6}] -width 1 -outline black \ |
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147 | -fill SkyBlue2] |
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148 | $c addtag point withtag $item |
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149 | } |
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150 | |
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151 | $c bind point <Any-Enter> "$c itemconfig current -fill red" |
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152 | $c bind point <Any-Leave> "$c itemconfig current -fill SkyBlue2" |
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153 | $c bind point <1> "embPlotDown $c %x %y" |
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154 | $c bind point <ButtonRelease-1> "$c dtag selected" |
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155 | bind $c <B1-Motion> "embPlotMove $c %x %y" |
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156 | while {[string first [$t get plot] " \t\n"] >= 0} { |
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157 | $t delete plot |
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158 | } |
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159 | $t insert plot "\n" |
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160 | $t window create plot -window $c |
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161 | $t tag add center plot |
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162 | $t insert plot "\n" |
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163 | } |
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164 | |
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165 | set embPlot(lastX) 0 |
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166 | set embPlot(lastY) 0 |
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167 | |
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168 | proc embPlotDown {w x y} { |
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169 | global embPlot |
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170 | $w dtag selected |
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171 | $w addtag selected withtag current |
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172 | $w raise current |
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173 | set embPlot(lastX) $x |
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174 | set embPlot(lastY) $y |
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175 | } |
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176 | |
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177 | proc embPlotMove {w x y} { |
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178 | global embPlot |
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179 | $w move selected [expr {$x-$embPlot(lastX)}] [expr {$y-$embPlot(lastY)}] |
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180 | set embPlot(lastX) $x |
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181 | set embPlot(lastY) $y |
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182 | } |
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183 | |
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184 | proc textWindDel w { |
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185 | set t $w.f.text |
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186 | if {[winfo exists $t.c]} { |
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187 | $t delete $t.c |
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188 | while {[string first [$t get plot] " \t\n"] >= 0} { |
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189 | $t delete plot |
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190 | } |
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191 | $t insert plot " " |
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192 | } |
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193 | } |
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194 | |
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195 | proc embDefBg t { |
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196 | $t configure -background [lindex [$t configure -background] 3] |
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197 | } |
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